Patient Care ARRT registry prep exam
1 questions and answers
What is the primary purpose of the ALARA principle in diagnostic
imaging? -
correct answer ✅To reduce radiation dose to occupational workers
Which cardinal rule of radiation protection is mathematically
defined by the inverse square law? -
correct answer ✅distance
In order reduce the occupational dose during a portable radiograph
of the chest, the technologist should: -
correct answer ✅stand several feet away from the patient during
the exposure
What property of lead makes it a valuable material for radiation
shielding devices? 1. high atomic number2. high density3. high
attenuation -
correct answer ✅1, 2, and 3
Which of these materials requires the smallest half-value layer
(HVL) to effectively attenuate the x-ray beam? -
correct answer ✅lead
,Patient Care ARRT registry prep exam
1 questions and answers
How does increasing x-ray beam energy influence the attenuation
properties of shielding materials? -
correct answer ✅A. Increased energy decreases attenuation
How does radiation dose change if a technologist increases their
distance from a radiation source by a factor of 2? -
correct answer ✅D. Dose decreases by a factor of 2 squared
How does radiation dose change if a technologist decreases their
distance from a radiation source by a factor of 3? -
correct answer ✅B. Dose increases by a factor of 3 squared
A half-value layer (HVL) is the thickness of material required to
reduce the -
correct answer ✅beam intensity by half
A shielding device constructed with a thickness equivalent to 1 HVL
will reduce the quantity of radiation to: -
correct answer ✅1/2 the original quantity
, Patient Care ARRT registry prep exam
1 questions and answers
A shielding device constructed with a thickness equivalent to 2
HVL's will reduce the quantity of radiation to: -
correct answer ✅C. 25% of the original quantity
The most commonly used shielding material in medical imaging is: -
correct answer ✅lead
What lead thickness equivalence is required for protective lead
aprons designated for general radiography, surgery, and
fluoroscopy? -
correct answer ✅.5
The use of leaded glasses is recommended for occupational use in
medical imaging in order to prevent which of the following
conditions? -
correct answer ✅radiation induced cataracts
What lead thickness equivalence is required for protective glasses?
-
correct answer ✅.35mm
1 questions and answers
What is the primary purpose of the ALARA principle in diagnostic
imaging? -
correct answer ✅To reduce radiation dose to occupational workers
Which cardinal rule of radiation protection is mathematically
defined by the inverse square law? -
correct answer ✅distance
In order reduce the occupational dose during a portable radiograph
of the chest, the technologist should: -
correct answer ✅stand several feet away from the patient during
the exposure
What property of lead makes it a valuable material for radiation
shielding devices? 1. high atomic number2. high density3. high
attenuation -
correct answer ✅1, 2, and 3
Which of these materials requires the smallest half-value layer
(HVL) to effectively attenuate the x-ray beam? -
correct answer ✅lead
,Patient Care ARRT registry prep exam
1 questions and answers
How does increasing x-ray beam energy influence the attenuation
properties of shielding materials? -
correct answer ✅A. Increased energy decreases attenuation
How does radiation dose change if a technologist increases their
distance from a radiation source by a factor of 2? -
correct answer ✅D. Dose decreases by a factor of 2 squared
How does radiation dose change if a technologist decreases their
distance from a radiation source by a factor of 3? -
correct answer ✅B. Dose increases by a factor of 3 squared
A half-value layer (HVL) is the thickness of material required to
reduce the -
correct answer ✅beam intensity by half
A shielding device constructed with a thickness equivalent to 1 HVL
will reduce the quantity of radiation to: -
correct answer ✅1/2 the original quantity
, Patient Care ARRT registry prep exam
1 questions and answers
A shielding device constructed with a thickness equivalent to 2
HVL's will reduce the quantity of radiation to: -
correct answer ✅C. 25% of the original quantity
The most commonly used shielding material in medical imaging is: -
correct answer ✅lead
What lead thickness equivalence is required for protective lead
aprons designated for general radiography, surgery, and
fluoroscopy? -
correct answer ✅.5
The use of leaded glasses is recommended for occupational use in
medical imaging in order to prevent which of the following
conditions? -
correct answer ✅radiation induced cataracts
What lead thickness equivalence is required for protective glasses?
-
correct answer ✅.35mm
